“The 'Allenburys' Feeder is made with a central base and two tapering undersurfaces.  This enables the bottle to be tilted, and it will remain in either position desired, thus obviating the necessity for the attendant to hold the bottle in the hand while the child is being fed.  The bottle is made without corners, and so can be thoroughly and easily cleaned.  It is not necessary to boil the bottle.”  - package insert